By joining with the teams of Graber-Szyszkowitz ZT GmbH (2006) and FA & WO Ingenieure GesBR (2014), convex ZT GmbH has more than 35 years of continuous experience in national and international construction projects. Our competence gained from this experience points to a successful future.
1981 Foundation of Graber-Szyszkowitz ZT GmbH. Design Office for Structural Engineering, Projects in Austria and abroad.
1988 Foundation of FA & WO Fazeli-Wolfesberger Ingenieure GesBR. Design Office for Structural Engineering, Projects in Austria and abroad.
2004 Foundation of convex ZT GmbH. Design Office for Civil and Structural Engineering, Projects in Austria and abroad.
2006 Joining of Graber-Szyszkowitz ZT GmbH and convex ZT GmbH. DI Adolf Graber retires, DI Dr. Tassilo Szyszkowitz continues to work fully.
2007 Foundation of convex Ltd. Şti. in Istanbul, Turkey. Design Office for Civil Design, Construction Management and Site Supervision.
2007 Foundation of convex consulting engineers s.r.l. in Bukarest, Romania. Design Office for Civil Design, Construction Management and Site Supervision.
2007 Founding partner of A & N Property Development GmbH.
2014 Joining of FA & WO Ingenieure GesBR and convex ZT GmbH. DI Johann Wolfesberger retires, DI Madjid Fazeli continues to work fully.
2016 Establishment of divisions for architectural design, structural design, drafting and special issues with respective division managers due to grown number of projects and employees.
2017 DI Sandra Heiligenbrunner and DI Florian Knobloch are appointed as Authorised Officers.
2018 Establishment of divisions for mechanical design and electrical design.